When 2 NEGATIVE SIGNS (NEGATIVE FORCE FIELDS) are together (-) (-) , the numbers are

multiplied and the first NEGATIVE SIGN is turned upright and we call it a CHANGING SIGN and

the 2 signs are rearranged to form a + sign. The first NEGATIVE SIGN (-) is turned to look like

this | called a CHANGING SIGN. With the second NEGATIVE SIGN it makes a POSITIVE SIGN (+).

Example: (- 4) (- 3)  =  POSITIVE   12   Example: (- 5) (- 6)  =  POSITIVE   30

Example: (- 2) (- 9) = POSITIVE 18

[QUESTION    37]        (-  2)  (-  3)   =  6